/* 各种颜色导航栏各色的字体 */
    .dropdown .dropdown-menu li:nth-child(1) a{
        font-size: 12px;
        font-weight: bold;
        color: black;
    }
    .dropdown .dropdown-menu li:nth-child(2) a{
        font-size: 12px;
        font-weight: bold;
        color: rgb(187, 187, 59);
    }
    .dropdown .dropdown-menu li:nth-child(3) a{
        font-size: 12px;
        font-weight: bold;
        color: rgba(63, 6, 116);
    }
    .dropdown .dropdown-menu li:nth-child(4) a{
        font-size: 12px;
        font-weight: bold;
        color: rgb(83, 189, 83);
    }

    /* 切换经典灰色导航栏 */
    .navbar-inverse.black{
        background-color: black;
    }
    /* 切换紫色导航栏 */
    .navbar-inverse.yellow{
        background-color: rgba(255, 255, 0, 0.301);
    }
    /* 切换紫色导航栏 */
    .navbar-inverse.porple{
        background-color: rgba(132, 0, 255, 0.616);
    }
    /* 切换紫色导航栏 */
    .navbar-inverse.green{
        background-color: rgba(0, 255, 0, 0.377);
    }